After losing a leg as a toddler and struggling with repeated infections, Cassandra Quave became obsessed, even as a young child, with preventing infection. That obsession has led her from Florida's swamps to the Peruvian Amazon in pursuit of plants that can defeat antibiotic-resistant superbugs. Her stories are personal, riveting and inspiring, and they offer hope for a medical future that's quite different from our present.

Guest: Cassandra Quave, author of "The Plant Hunter: A Scientist's Quest for Nature's Next Medicines" and Associate Professor of Dermatology and Human Health at Emory School of Medicine